651195966 has 8 divisors (see below), whose sum is σ = 1302391944. Its totient is φ = 217065320.

The previous prime is 651195947. The next prime is 651195971. The reversal of 651195966 is 669591156.

It is a sphenic number, since it is the product of 3 distinct primes.

651195966 is an admirable number.

It is a super-3 number, since 3×651195966³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54266325 + ... + 54266336.

It is an arithmetic number, because the mean of its divisors is an integer number (162798993).

Almost surely, 2^651195966 is an apocalyptic number.

651195966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651195966 is a wasteful number, since it uses less digits than its factorization.

651195966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108532666.

The product of its digits is 437400, while the sum is 48.

The square root of 651195966 is about 25518.5416119339. The cubic root of 651195966 is about 866.7700580465.

The spelling of 651195966 in words is "six hundred fifty-one million, one hundred ninety-five thousand, nine hundred sixty-six".